.2.[2] , -V, 2- , .. a crc1= 0,3 a crc2= 0,2 .
fu = 2,89 . :
Ared = 2549102 2.
y o=108 .
Ired = 1563106 4
W infred = 14418 3, - Wsupred = 14014 3.
Winfpl = 21627 3,
Wsuppl = 21022 3.
z = Z =16,9 = 169 ,
z = ZL =16,7 = 167 .
= L = 0,316.
b = BRED = 58,59 = 586 .
, = F =0,544.
.6.
. 1- 6 .5[2]:
:
s1 =0,1·700-20=50
: s2 =0
: s3 = Δl/lEs =4,25/6900190000=117,03
Δl =1,25+0,15d=1,25+0,1520 = 4,25
l =5,9+1=6,9.
s4 s5
1 .1-5 .5 [2]
I = (s sp - s1- s2- s3) Asp = (700 50 117,03) 628 = 334,7 .
I , eop = y o a = 108 30 = 78.
, 1 w . (. .2) qw = 2,762,2 = 6,072 /,
Mw = qw l 2o/8 = 6,075,7752/8 = 25,31 ͷ.
s bp (.. y = eop = 78)
s bp = + = 1,35 .
s¢ bp (.. y = h - y o =220 108 = 112 )
s¢ bp = - = 1,25 .
Rbp = 15,5
(R(p)bn = 11 , R(p)btn = 1,15 ), [2,.2.6.].
:
a = 0,25 + 0,025 Rbp = 0,25 + 0,02515,5 = 0,64 < 0,8;
s bp / Rbp = 1,35/15,5= 0,087 < α=0,64
|
|
- s6 = 40s bp / Rbp = 401,35/15,5 = 3,48 ;
- s¢6 =40 1,25 /15,5 = 3,23
s los 1 = s1 + s3 +s6 = 50+0+117,03+3,48 = 170,51 ,
P 1 = (s sp - s los 1) Asp = (700-170,51)·628= 332,5 .
1 , y = y o= 108 ,
s bp = + = + = 3,10 .
s bp / Rbp = 3,10/15,5 = 0,20 < 0,95, .1.29[2] .
. 8 9 .5[2].
- s8 = s¢8 = 40·1,3=52 .
1 Mw, :
s bp = 1,34 ;
s¢bp = 1,26. >0
s bp / Rbp <0,75
- : s9 = 1,3·150 0,086=16,86
s¢9 = 15,85 .
s los 2 = s8 + s9 = 52+16,86 = 68,86 . s los = s los 1 + s los 2 = 170,51+68,86 = 239,37 . . . s los > 100 , , .
2 = (s sp - s los) Asp = (700-239,37)628= 289,3 .
.4.5 [2] .
s b = + = + =4,97 ;
j = 1,6 - s b / Rbn = 1,6 4,97/18,5= 1,33 > 1, j = 1,
rsup = j (Winfred / Ared) = 1 (14418103/2549102) = 56,6 .
1 ( ),
s b = - = > 0, .
Mr =Mtot=76.33 ·
Mcrc = Rbt,serW + Mrp = 1,621627103 + 38,94106 =73,54106ͷ = 73,54 ͷ;
Mrp =P2(eop + rsup) = 289,3103(78+ 56,6) = 38,94 ͷ.
Mcrc = 73,54 ͷ < Mr = 76,33 ͷ, .